Tar batter



T. W. STONE Jan. 24, 1933.

TAR BATTER Filed Jan. 25,- 1930 IN VENT OR.

l/ I J TamsMS/vna B y ATTZRNE? when they are open.

Patented Jan. 24, 1933 V UNITED; sr T fs 1 TE; OFF-ICE i consrnuc'rxon COMPANY, A 'conronA'r o v or INDIANA Application filed January I 25, i 1930. "Serial m5. 423,392.

This invention relates to tar batter valves for gas generating sets and more particularly relates to means for cooling such valves without sealing the valves with cooling liquor The invention also ment oftheimproved valves in gas apparatus in such manner as to prevent theentry of airor oxygen into the gas main connected thereto. V V p d When oil is used for carburetting the gas, enough tarry matter is formed to coat-the seats of the tar batter valvesas constructed heretofore and to stop leaks due :to minor irregularities. If water ga'sis made-without enrichment, the absence of tarrymatter'allows any dust in the gas to wear the-seats of valves not made in accordance with my invention and there is nothing present to prevent leakage past worn places.

-An object of my invention is to render the operation of the, valve independent of an adhering coat of tar by having both the seat of the valve and the movable valve member flooded with tar batter liquor while the valve is open. 7 a Theli'quid flooding the seat 'andmovable member forms a curtain "or film extending from the seat to the member and gas assing through the open valve'must pass t rough this sheet or film of liquidL- r The closing of the valvestops the flow of liquid if thevalve closes perfectly but if any imperfection occurs in the seating, the liquid continues to flood any parts of the seat5'and movable member not in firm contact, thereby substituting a harmless flow of liquid for a leakage of gas at the imperfection.

The constant presence of liquid. in and about the valve parts makes it unnecessary to have a dip pipe or to submerge the end 'of the pipe which serves as the seat of thevalve in the liquor of thetarbatte'r .and a further .obj ect of the invention isto so rearrange the tar batter as to prevent any air leaking into the tar batter from enteringthe gasmainof the gas generating set. i a a V i n'the drawing. 1

glue '1 .'s a -.vertical-sectional yview through the valve and comprises the arrangethrough a gas main 19.

Fig.2is a view elevation and partly in vertical section showing thefapplication of the valve to the tarbatter of a gasmaking set. The valve shown in against the seat 3 forming a .welded to thevalve body. 4; hymeans of fillets 9. l s i l I i .,The gas-making "shown in I 2 oomprises a generatori'll; a carburettor 12, a

superheater 13' and atar batter A gas ofitake pipe 15 connects theto'pof the generator to the top ofthe carburetter, a

shortpipe 16 connects the bottom of the carburetter to the bottom of thefsuperheater and the pipe-17 connects. the top ofthe superconnects thebottom of the generator 11 to the tar batter-14 and gas leaves the tar batter Air is supplied to the bottom of the generator throughblast pipe 21 which is joined to the lower end of theback run pipe 18. Sec- Fig. 1 comprises a disc 1gmounted on a-stem 2, the valve disc when "closed bearing part offa body/1. 1

The .valveseat3 is provided with a groove f 7 heater to the tar batter. Abackrun pipe 18 y ond'ary air is supplied to the top of. the car buretter through'gas ofitake 15Lby means of secondary air blast pipe '22. The main air blast pipe is-provieled'with a valve .23 and the secondary air pipe witha valve 24.: A

stackvalve 25" isloca ted at" the top ofthe- All of these valves are operated by means of hydrauliocylinders.

superheater.

Steam is. suppliedto' the base of the generator through a valve 26 and passesupward- I 1y through the fuel bed 27 during the up;-run period of the cycle. Down-run steam is supplied to the top of the superheater through .a, valve 28.- Both steam valves'a're operatedwithyhydraulic cylinders that are 1n turn actuated by means of 'fluidfrom an automaticjhydrauliccontrol (not shown).:-

The carburetter' is equipped with anoil" valve: 40 is operated by cylinder 41, The 5 stem'2 of the valve passes through a? stuflin'g spray 30 and the generator is equipped with a fuel charging door 81. The tar batter is provided with an over-flow, tank or sump 32. Pipes 17 and 18 are independent and are 7 closed by blank plates 33.

A valve controls the flow. of gas from the pipe 17'into theupper part of the tar batter 14, the several parts of'which valve,, ,correspond exactly to those'ofthe valve shown in Fig. 1." Theevalve 35 is operated by means of ahydraulic cylinder 36, the

I valve stem connected thereto passing throu h stuffing gland 87. Any overflow of 'water 11 from the pipe 8 drainsi'nto pipe 38;.and. into the overflow tank 32and prevents flooding of pipe 17 Ordinarily there will not be enough leakage from'groove 5 past iseat"3 -to'cause any overflow through'pipe' 38. I

Valve controlsthe flow of' gas from .pipe 18 'intothe 'top of the tar batter; The

gland 4C2. Any e eess of water entering the valv'efl lO through" pipe 8 when it is closed overflows through pipe 43, thereby preventing flooding of theback-run pipe 18. Such Ian excess of water'would leak past the valve seat 3 only/under unusual circumstances.

1 The tarbatter is provided with arhorizontal diaphragm or partition 4A located. about midway between the top and bottom thus dividing thetar batter into two superimposed I eompartments 14a and letb. -An overflow pipe permits the tar batter liquor to flow 7 from the upper compartment 14a of thetar batter and maintain the level of the liquid at"46.; The waterflows into thelower'com- :partment 14b of the tar batter through overflow pipe 45 which also permits gas to pass downwardly and bubble through liquor contained in the lower compartment 14?; of the tar batter 14. An overflow pipe et7 located above the level of'the lower end of the pipe tank'32"whi'ch=in overflow pipe 48.

In operation, I j tar batter liquor enters the annular chamber ;7 formed ofchannel iron through the pipe 45 maintains a normal level of liquor-inf the lower part of the batter-box eflective to seal the pipe 4 5 againstflow of gas in a rep verse direction-and drains into thejoverflow turn is provided with an water or other liquid suchas 84and entersthe groove 5 through holes When the valve is" open 7 r p and thedisc i i'sf f erg ed beneaththeliquid le'vel46, an

annular skirt or cylindricalshaped sheet of liquid is projected from the seat toward the edges of the disc and against the surface of 'the liquid at 46. Any gas passing through the valve breaks or bubbles through this sheet of water or tar batter liquor. q a

' When valve 40 shown 'n F ig, 2 is open,

back-run steam is passedinto the top of the o up r 3: Q val e 28 and stackvalve-2 5 is"; closed at' thisftime. The steam passes'down ward through' superheater 13 up ward; through a carburetter '12 and down "ward" through the fuel bed 27' in the gener- The, resulting passes upward through, back-run pipe 18 into-the upper part ofzthe tar batter passing:throughzthewannularsheet I I of :water showering down-'fromcthe valve seati3 of valve 40towards the'liquid level 16.

The gas then passes'downward through short 1 clip pipe 45- and from the lower part-of the tar *batter'lt -it passes out through ggas fmain" r When valve-40 is closed, valvei'35 is open,

up-run steam is passed through the valve 26 which generates gas" by: passing upward through'the fuel bed 27 The resulting gas then'passes down through carburetter 12 up w through superheater 1'3 and through pipe-17 into the-top of the tar batter, the stack valve being closed'atthis time. The gas entering the tan batterthrough valve 351 i passes ugh pipe 45 and into the gas main l9'.

During the blow periodof the'cycle, the stack valve 25 -is-open, the*valve"4Q is'closed and the valv'e 35Y is op'eni The main. blast valve23' is open admitting air'tothe bottom ofjthe generatorfrom'blastpipe'21.- Auip V ili'ary' blastvalve 2 1 is" open so that'sair from pipe 22 burns I any, carbon--monoxide formed by the passing of air upwardpthroughjthe fuelbed "27. The, gases: of combustion pass downward throughthe carburettor, upward" through :superheater and out through the stack valve;

If 'at this time any? leakage t meugh; the

pipe 45 and into the gas main 19,"- takes the path of least resistance through-the open valve .35iand pipe 17 V to the open stackvalve.

"Although the=singlef embodiment" of my inventi onthat is illustrated is 1 shown applied .toa water gas set equipped with'a carburetter r it 1 is V of" even greater advantage when-applied tofan uncarburetted set.

seat can be located above or'independent of the liquor in :the tar batter, twoi of'isuch valves can be so arranged in thetar batter of a j 'gasemaki'ng' set that-any air-leakinglthroughthe back-run pipe atfthe amenarmrmuer closed valve m sh'ould occur, the small amount of airjinstea'd of passingthrough An important advantage of the valve is that the end of the pipe that servesasth'e seat 0f the valve need not besubmerged ina cool- -ingvjli'quid or in tar batteriliquor, Since the the generator is being blasted passes out of the stack valve.

Even such leakage, though harmless with this valve, is not apt to occur because when the valve is closed, any minute irregularity in the valve seat or valve disc will merely permit water to flow out of the annular groove in whichever direction the lack of firm contact occurs. The water pressure'in the annular groove is always kept slightly higher than the pressure of the gas being controlled.

Wear of the valve seat 3 or valve disc 1 does not take place to any great extent because when the valve is open, there is so much water flowing out of the annular groove 5 and toward the submerged rim of the valve disc'l that any dry dust particles in the gas cannot score or abrade the seat. Moreover, at the moment of closing the valve, the flow of liquid is such that any adhering abrasive particles are washed away.

Although the seat of the valve in use is not submerged in a solid body of liquid, the gas passing through the open valve is washed to the same degree as if the entire valve were submerged because it has to flow through the annular sheet of water or tar batter liquor that is projected from the valve seat against the surface of the liquid in which the valve disc is submerged in its open position. 7

I claim as my invention:

1. A tar batter'fora gas generator, comprising two superimposed compartments, a pair of inlets in the upper compartment, valve members adapted to alternately and oppositely open and close said inlets, an overflow conduit for the lower compartment, a gas conduit leading from a point within said upper compartment to a point in the lower compartment lying below the level of said overflow conduit, and a gas ofltake'for said lower compartment.

2. A tar batter for a gas generator, comprising two superimposed compartments, a pair of inlets in the upper compartment, fluid-sealed valve members adapted to alternately and oppositely open and close said inlets, an overflow conduit for the lower compartment, a gas conduit leading from a point within said upper compartment to a point in the lower compartment lying below the level of said overflow conduit, and a gas ofli'take for said lower compartment.

In testimony whereof, I have hereunto subscribed my name this 23rd day of January,

THOMAS W. STONE. 

